I don’t think, it really matters whether it fixes a bug. This is about how many code changes it makes and therefore how many new bugs, it potentially introduces.
This explicit sync thingamabob was definitely a bigger code change.
I do find it weird that Ubuntu terminates this exception, seemingly from one disagreement, but hard to say what went on behind the scenes beforehand. And as the other guy pointed out, I don’t think the impact of this decision is that big, so I’m not sure, it deserves infinite scrutiny…